Strip Mine Ponds
My recent research into coal mines in the Bridgeville area has been focused on underground (shaft) mining and, indeed, that was the primary method used prior to the 1930s. It neglected the portions of the Pittsburgh Seam close to the level of Chartiers Creek, too deep for surface mining and too shallow for shaft mining. A new technique (strip mining) had to be adopted. The first step for this technique was to use a large power shovel to remove a long (several hundred feet) strip of overburden (usually about ten feet thick) and perhaps forty feet wide, piling the overburden…








